def bounds(self, top_level_bounds):
""" return lat,lon bounds given toplevel BB bounds
``top_level_bounds`` is a tuple with (ne, sw) being
ne and sw a (lat, lon) tuple
return bounds in the same format
"""
righttop = Mercator.project(*top_level_bounds[0]) #ne
leftbottom = Mercator.project(*top_level_bounds[1]) #sw
topx = leftbottom[0]
topy = righttop[1]
w = righttop[0] - leftbottom[0]
h = -righttop[1] + leftbottom[1]
sp = SPLITS**self.z
sx = w / sp
sy = h / sp
return (Mercator.unproject((self.x + 1) * sx + topx,
(self.y) * sy + topy),
Mercator.unproject(self.x * sx + topx,
topy + (self.y + 1) * sy))
def bounds(self, top_level_bounds):
""" return lat,lon bounds given toplevel BB bounds
``top_level_bounds`` is a tuple with (ne, sw) being
ne and sw a (lat, lon) tuple
return bounds in the same format
"""
righttop = Mercator.project(*top_level_bounds[0]) #ne
leftbottom = Mercator.project(*top_level_bounds[1]) #sw
topx = leftbottom[0]
topy = righttop[1]
w = righttop[0] - leftbottom[0];
h = -righttop[1] + leftbottom[1];
sp = SPLITS**self.z
sx = w/sp;
sy = h/sp;
return (
Mercator.unproject((self.x + 1)*sx + topx, (self.y)*sy + topy),
Mercator.unproject(self.x*sx + topx, topy + (self.y+1)*sy)
)
